Netscape wrote:Beta 2 addresses the following issues that appeared in Beta 1:

* Added URL as a tooltip to Linkpad entries* Added "Reload" to the FAS and Tracker sidebar context menus* Closing the last tab will now close the browser window* Fixed the CFBundleSignature on the Mac DMG* Fixed bug when removing the location bar while customizing the toolbar* Various fixes to in-browser voting* Various performance fixes

It works. I don't use any of the features listed, so it does not matter to me, one way or other.
I installed it top of the previous version. No problem. A couple of Addons were, probably, not compatible. Nightly Tester Tools took care of that.